Improvement in the manufacture of glue



NITED S'rirrns PATENT ()FFICII.

a E. II. NEYMANN, OF NEW YORK, N. Y.

lIV IPRO VEME NT INVTHE MANUFACTURE OF GLUE.

s iecifica tion forming part-of Letters Patent No. 97,771. datedDecember ll, 1&69.

v L To all whom it may concern.-

. Be it known. that I, GEORGE GUENTHER,.Of Chicago, in the county ofCook and State of l Illinois, have invented'certain new and usefulImprovementsin Glue; and I do hereby de quently dried on nets and storedand transported in the form of thin dried cakes, which require to besoaked, boiled, and stirred for a .longperiod beforethe glueis' readyfor use.

'Besides the loss of time and labor involved in this operation, theadhesive quality ofthe glue is alwaysliable to be seriouslyaffected bypartialdecay in case of. drying in the ordinary atmosphere, and byscorching and other causes when dried by artificial heat.

I take freshly-made glue of very good stock before the boilinghasproceeded to the consistency required for molding and cutting inslices, and pour it into previously-heated cases, stop each tightly, andtransfer it through suitable double doors or otherwise, in an in- Iverted position, into a strong chamber, within which is maintained atemperature a little above 212 Fahrenheit and a pressure a little belowthe ordinary atmospheric. I can keep asufficient vacuum by means of amoderatesized air-pump. l By supplying in one part of the samechamber achemical agentthat has a great affinity for water I- succeedinmaintaining a very dry atmosphere in the chamber,

.. and the pressure within each case forces out a small quantity throughthe joints around the stopper or closedmouth, andthis glue, by

dryingas soon as it appears on the exterior,

forms a perfectly-tight seal.

.I find that bottles of strong glass in the or; dinary rounded form, butwith shorter necks, may be used'with advantage, corked with com- 111011or very inferior corks. This makes a very convenient form for mypackage, and the bottles, being cheap; may be broken when- 'ever it isrequired to obtain access to the contents. Tin cans, similar to thoseused in putting up fruit, may be used, if preferred; but

in either case it is not essential to userubber, resin, or other sealingagent, because the glue,

caused to exude and dry, as described, forms I at the same time atighter and more adhesive 1node of closing than can be procured by anyAftera W other means, and at far less expense. very brief interval inthe drying, or what I call the vacuum, chamber, the packages may beremoved and slowly cooled.

My glue may be kept for any period in any climate and under anyconditions. When it is desired for use, the vessel may be opened eitherby moistening the glue at the mouth. and opening, so as to preserve thevessel, or

bybreaking or cutting, and the semi-fluid contents are ready to beheated and diluted with water to any required extent and usedimmediately. My invention is intended more par ticularly formanufacturers, who not only requirethe very best kind of glue, but whouse considerable quantities. A package, when opened, should be emptiedentirely.

I believe that success may be attained in the manufacture of my packagesby drying their months in the ordinary pressure of the atmosphere; butthis requires a more delicate ad justment of heat, so as to get atemperature a little above the boiling-point of thick glue, and notenough above to damage the product. I prefer the partial vacuumdescribed. I It is then easy to obtain the desired effect with a verymoderate heat-say 215 Fahrenheit.

I claim- I I As a new article of manufacture, the withindescribed cannedglue, prepared substantially in the manner and so as to combine theadvantages herein set forth.

In testimony whereof I have hereunto set my .name in presence of twosubscribing wit. nesses.

i I GEO. GUENTHER. WVitnesses: v

0.0. LIVINGS, MARION A. Down.

